本文選題：無線軟件定義網(wǎng)絡(luò)　切入點(diǎn)：擁塞控制　出處：《電子科技大學(xué)》2017年博士論文

【摘要】：無線網(wǎng)絡(luò)中大量數(shù)據(jù)傳輸會(huì)造成網(wǎng)絡(luò)擁塞,導(dǎo)致網(wǎng)絡(luò)性能下降,無線軟件定義網(wǎng)絡(luò)(Wireless Software Defined Network,WSDN)穩(wěn)定性擁塞控制技術(shù)是解決網(wǎng)絡(luò)擁塞的技術(shù)手段。該技術(shù)通過優(yōu)化在傳播時(shí)延和外部干擾影響下WSDN中網(wǎng)絡(luò)參數(shù),保持網(wǎng)絡(luò)性能穩(wěn)定。本文分別從分布式和集中式擁塞控制技術(shù)的分析著手,對(duì)傳播時(shí)延下穩(wěn)定性算法以及傳播時(shí)延和外部干擾下魯棒性算法進(jìn)行了深入研究,主要開展了WSDN穩(wěn)定性擁塞控制技術(shù)的模型建立、控制算法和性能分析研究,本文主要貢獻(xiàn)概括如下:(1)針對(duì)大量數(shù)據(jù)傳輸導(dǎo)致WSDN中擁塞控制的不穩(wěn)定問題,即如何在穩(wěn)定性擁塞控制下使得在傳播時(shí)延下WSDN網(wǎng)絡(luò)參數(shù)穩(wěn)定在最大化全局吞吐量優(yōu)化值處,以及在魯棒性擁塞控制下使得在傳播時(shí)延和外部干擾下網(wǎng)絡(luò)參數(shù)長時(shí)間保持其穩(wěn)定狀態(tài),提出了一種分層分布式WSDN的網(wǎng)絡(luò)架構(gòu)。該網(wǎng)絡(luò)架構(gòu)由WSDN核心網(wǎng)(Core-WSDN)和分簇?zé)o線傳感器網(wǎng)絡(luò)子網(wǎng)(Subnetwork Cluster Wireless Sensor Network,Sub-CWSN)兩部分混合分層組成。通過混合分層方式,分別研究了在傳播時(shí)延和外部干擾下WSDN中分布式Sub-CWSN和集中式Core-WSDN擁塞控制的穩(wěn)定性。提出了相應(yīng)的穩(wěn)定性擁塞控制算法,經(jīng)理論分析,得到了傳播時(shí)延下無線網(wǎng)絡(luò)參數(shù)穩(wěn)定在最大化全局吞吐量優(yōu)化值處的穩(wěn)定充分條件;并提出了相應(yīng)的魯棒性擁塞控制算法,經(jīng)理論分析,得到了傳播時(shí)延和外部干擾下無線網(wǎng)絡(luò)參數(shù)能保持在優(yōu)化狀態(tài)下的穩(wěn)定充分條件。解決了WSDN擁塞控制的全局穩(wěn)定性控制問題。(2)針對(duì)WSDN穩(wěn)定性擁塞控制的全局吞吐量性能優(yōu)化問題,提出了相應(yīng)的最大化全局吞吐量的調(diào)度算法�；赪SDN的網(wǎng)絡(luò)參數(shù),分析網(wǎng)絡(luò)中處理數(shù)據(jù)流的節(jié)點(diǎn)資源分配。該算法是一種網(wǎng)絡(luò)資源公平分配的優(yōu)化算法,為擁塞控制的穩(wěn)定性算法提供了理想化的控制目標(biāo),為WSDN穩(wěn)定性和魯棒性擁塞控制算法的實(shí)現(xiàn)提供了支撐。(3)考慮分布式Sub-CWSN全局穩(wěn)定性擁塞控制,通過對(duì)其網(wǎng)絡(luò)參數(shù)和所需探測調(diào)整技術(shù)的分析,本文先提出了一種基于加性增加乘性減少(Additive-Increase Multiple-Decrease,AIMD)策略、隨機(jī)早期檢測(Random Early Detection,RED)和鄰居節(jié)點(diǎn)信道競爭的調(diào)整算法。在此算法基礎(chǔ)上,給出了Sub-CWSN簇同步概念,即同一簇中所有節(jié)點(diǎn)發(fā)送速率增減一致,再提出了一種Sub-CWSN全局穩(wěn)定性擁塞控制簇同步算法,采用控制論中穩(wěn)定性分析法,通過對(duì)Lyapunov-Krasovskii泛函的分析,將無線網(wǎng)絡(luò)擁塞控制策略和控制論中穩(wěn)定性分析理論相結(jié)合,使得Sub-CWSN全局擁塞控制算法轉(zhuǎn)化為擁塞控制全局簇同步算法,最后得到了穩(wěn)定性擁塞控制的穩(wěn)定充分條件。數(shù)值結(jié)果表明該算法滿足穩(wěn)定充分條件,能將網(wǎng)絡(luò)參數(shù)穩(wěn)定工作在最大化吞吐量的優(yōu)化值處,實(shí)現(xiàn)了穩(wěn)定性擁塞控制,比傳統(tǒng)RED算法具有優(yōu)勢。(4)針對(duì)傳播時(shí)延和外部干擾對(duì)Sub-CWSN和Core-WSDN擁塞控制系統(tǒng)影響導(dǎo)致網(wǎng)絡(luò)開銷增大和不穩(wěn)定等問題,建立了在傳播時(shí)延和外部干擾下?lián)砣刂颇Ｐ?提出了實(shí)現(xiàn)該模型相應(yīng)的魯棒性擁塞控制算法。該算法在無線網(wǎng)絡(luò)穩(wěn)定的前提下,能克服傳播時(shí)延和外部干擾的影響,實(shí)現(xiàn)魯棒性擁塞控制,經(jīng)理論分析,得到了魯棒性擁塞控制的穩(wěn)定充分條件。數(shù)值結(jié)果表明該算法滿足穩(wěn)定充分條件,能將網(wǎng)絡(luò)參數(shù)長時(shí)間穩(wěn)定工作在最大化吞吐量的優(yōu)化值處,解決了在傳播時(shí)延和外部干擾下無線網(wǎng)絡(luò)擁塞控制的全局魯棒性控制問題,比傳統(tǒng)擁塞控制算法具有優(yōu)勢。(5)為了簡化Core-WSDN擁塞控制算法過程,通過中央控制器基于全局擁塞狀態(tài)信息,給出了填充等待時(shí)間概念,建立了在傳播時(shí)延和外部干擾下?lián)砣刂颇Ｐ?提出了一種集中式Core-WSDN離散魯棒性擁塞控制算法,經(jīng)理論分析,得到了魯棒性擁塞控制算法的穩(wěn)定充分條件。數(shù)值結(jié)果表明該算法滿足穩(wěn)定充分條件,能將網(wǎng)絡(luò)參數(shù)長時(shí)間穩(wěn)定工作在最大化吞吐量的優(yōu)化值處,解決了在傳播時(shí)延和外部干擾下集中式Core-WSDN離散擁塞控制的全局魯棒性控制問題。與已有算法相比,簡化了網(wǎng)絡(luò)擁塞控制算法過程,使魯棒性擁塞控制算法易于實(shí)現(xiàn)。
[Abstract]:The wireless network data transmission will cause network congestion, resulting in the decline of the network performance, wireless software defined network (Wireless Software Defined Network, WSDN) the stability of congestion control technology is to solve the technical means of network congestion. The technology by optimizing the WSDN network parameters in the propagation delay and disturbance, maintain a stable network performance analysis in this paper. Respectively from the distributed and centralized congestion control technology to the robustness of the algorithm of propagation delay stability algorithm and propagation delay and external disturbance is studied, and to carry out the stability of WSDN congestion control technology research model, control algorithm and performance analysis, the main contributions of this paper are summarized as follows: (1) for a large number of data the transmission leads to the instability problem of congestion control in WSDN, which is how to make the stability of congestion control in transmission delay under WS Stability of the DN network optimization value in maximizing the global throughput, keep long time and network parameters in the propagation delay and external disturbance under the stable state in robust congestion control, we propose a layered distributed WSDN network architecture. The network architecture by WSDN core network (Core-WSDN) and clustering algorithm in wireless sensor networks subnet (Subnetwork Cluster Wireless Sensor Network, Sub-CWSN) the two part composition. By mixing the mixed layered layered way, WSDN Sub-CWSN and Core-WSDN in distributed centralized congestion control stability in the propagation delay and external disturbance were studied. The stability of congestion control algorithms, through theoretical analysis, the stability of the wireless network transmission parameters under the optimized value of delay stability sufficient condition at maximum global throughput; and puts forward the corresponding robust congestion control algorithm, By theoretical analysis, the parameters of a wireless network propagation delay and external disturbance can maintain stability sufficient condition in the optimization condition. To solve the global stability problem of WSDN congestion control. (2) according to the global throughput performance optimization problem of the stability of WSDN congestion control, scheduling algorithms are proposed to maximize the overall throughput of the corresponding. The network parameters based on WSDN node resource allocation analysis of data stream processing in the network. The algorithm is a fair distribution of cyber source, provides an ideal target for the stability control of congestion control algorithm, WSDN algorithm for the stability and robustness of the congestion control provides support for distributed Sub-CWSN (3). The global stability of the congestion control, through the analysis of the network parameters and the required adjustment of detection technology, this paper first presents an additive increase multiplicative decrease based on Less (Additive-Increase Multiple-Decrease, AIMD) strategy, random early detection (Random Early Detection RED) algorithm to adjust competition and neighbor channel. On the basis of this algorithm, gives the concept of Sub-CWSN cluster synchronization, namely all nodes in the same cluster sending rate increase, and then proposes a congestion control algorithm of Sub-CWSN cluster synchronization stability overall, using the method of stability analysis in the control theory, through the analysis of the Lyapunov-Krasovskii function, the stability of wireless network congestion control strategy and control theory analysis combined with the theory of the Sub-CWSN global congestion control algorithm into congestion control global cluster synchronization algorithm, finally the stable sufficient conditions of the stability of congestion control is obtained. Numerical results show that the the algorithm meet the stability sufficient conditions can be optimized to maximize the throughput in the stability of the network parameters, to achieve a steady Qualitative congestion control has advantages over the traditional RED algorithm. (4) according to the propagation delay and external disturbance led to increase the cost of network problems and unstable Sub-CWSN and Core-WSDN congestion control system, established the model of congestion control in propagation delay and external disturbance, is proposed to realize the model robustness of the corresponding congestion control algorithm in the premise of the wireless network. The algorithm is stable, can overcome the effects of propagation delay and external disturbance, to achieve robust congestion control, through theoretical analysis, obtained the sufficient conditions for robust stability of congestion control. The numerical results show that the algorithm meets the stability sufficient conditions can be optimized to maximize the throughput in the network parameters at the time of stable value, solve the robust control problem in the global wireless network congestion control propagation delay and external disturbance, is better than the traditional congestion control algorithm Potential. (5) in order to simplify the Core-WSDN congestion control algorithm, through the central controller based on global congestion information, are waiting to be filled with the concept of time, established a model of congestion control in propagation delay and external disturbance, proposes a centralized Core-WSDN discrete robust congestion control algorithm, through theoretical analysis, we obtain sufficient conditions the stability of the congestion control algorithm is robust. The numerical results show that this algorithm can satisfy the stability sufficient conditions can be optimized to maximize the throughput in the network parameter value is stable for a long time, to solve the robust control problem of discrete centralized Core-WSDN congestion control in propagation delay and external disturbance. Compared with the existing algorithms, the algorithm is simplified the process of network congestion control, the robust congestion control algorithm is easy to implement.

【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN915.0

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本文編號(hào)：1687229